Mechanism for feeding furnaces.



F. KINGSLEY. MECHANISM FOR FEEDING FURNACES. APPLICATION, FILED NOV. 1,1907. 900,390, Patented Oct. 6, 1908.

l we 7 v 3 $2 a L/ ass? evenness CQPY rerun KINGSLEY, of NEW Your, N. 1.. uncnsmsn roa sesame simmers;

To on whom it concern." Be it known-that I, FRANK KmosLnY, a

British subject, residing in. the borough of Manhattan, ofthe cit of New York, in the State of New York, have invented'certain new and useful Improvements in Mechanism for Feeding Furnaces, of which the following is a specification, reference being had to the accompanying drawings, forming a part hereof. I v

This invention relates to so called mechan* ical stokers or mechanism for feeding fuel to furnaces for steam boilers and other pur poses, and it is the object of the invention to provide sim lo and efficient mechanism which shall ave certain advantages over other mechanism heretofore used for the pur pose and shall overcome certain of the difficulties incident to the use of such mechanism.

One object of the invention is to. enable the pusher, by which the fuel ma be forced into the fire box, to'act also as a co breaker, to break up the coke already formed on the surface of the fuel in the fire box.

Another objeotis to enable thepusher to spread the fuel after it has been introduced into the fire box and after the volatile gaseshave been distilled from it.

Still another object is to enable the mechanism first to displace a portion of the fuel already introduced into the fire box near the fire door and then to deppsit a fresh charge in the place thereof, treby causing the smoky gases from the fresh fuel in the front of the fire to pass over an area of hot cokein the back of the fire before leaving the furnace, and still other objects are to effectively eventthe admission of cold air through the feeding mechanism, and generally to iniprove the construction and operation of mechanism of the character referred to.

The invention will be more fully described hereinafter with reference to the accompanying drawings, in which for purposes of illustration and explanation of the nature of the invention, it is shown as embodied in a convenient and practical form, and in which Figure 1 is aplan view of the improved mechanism a lied to a furnace of ordinary construction, t e walls of the latter and the fuel hobeing shown-in horizontal section. Fig. 2 is review in vertical section on the plane indicated by theline 2--2 of Fig. 1.

Figs. 3- and 4 are partial views, similar to Specification of Letters Patent.

Application filed November 1, 1907. Serial at. 400,302.

e door during the operation of the fuel" Patented Oct. 6, 1908.

Fig. 2, showing the parts in different posi tions.

The improved mechanism me. be applied to any ordinary furnace. Ass own-m the drawings, the furnace is represented as of usual construction, provided in its front wall a with an opening such as a fire door opening I) and provided interiorl with a grate which is preferably arranged as indicated in Fig. 2, comprising a horizontal section (5 immediately within the'fire door, an inclined section d, and, if desired, a dumping section e.

For convenience the fuel feeding mechanism. may be supported by a movable frame f which may be mounted upon wheels f and a f*, the latter being swiveled. If the fuel feeding mechanism is thus supported it can be readily moved away from the furnace door to give access to the furnace for any purpose, and as readily returned.

In the upper portion of the frame is mounted a suitab e hopper g to which the fuel may be so lied in any suitable manner, and below t e hopper are two pushers h and i, the pusher It being conveniently supported 11 on the flanges f 3 ofthe frame f while the pus er '1', may, if desired, be supported directl upon the pusher h and may beheld down, i necessary, b flanges f 4 of the frame f. The pusher is supported at such a height that it may enter the fire box and may be of any suitable construction. As indicated in the drawings, for example, it may be a simple casting, core-(l for the sake of lightness, and

' preferably having its forward and somewhat tapered or plow shaped to facilitate the spreading of the fuel. It is of such length and is given such range of reciprocating motion thatit not only pushes the fuel in front of it through the fire door into the furnace, but enters the furnace itself, over the horizontal grate c and operates both to break up the coke, which forms on the surface of the fuel over the horizontal grate, and to spread :the fuel both sidewisc and forward upon the inclined portion dof the grate, down'which i the fuel will gradually move as itis consumed and as it is urged forward by the addition, from time to time, of fresh fuel behind it. If desired, the pusher h might be provided for connection, as at h, 7?, with water circulating pipes, so that the usher may be kept cool and prevented from urning out.

The pusher k may be reciprocatcd by hand or by any other suitable means. As shownin the drawings, two steam cylinders 7c, k,

- mounted on the frame f and provided with suitable steam controlling valves, have their piston rods 1c is connected to a yoke h secured to the pusher h. I The pusheri,which is shown as supported directly on the pusher h and is also represented as a cored casting, which might be provided with. water circulating connections, is somewhat shorter than the pusher it, having as its functions to ermit the discharge from the hopper upon t e upper surface of the pusher h of a measured quantrt of fuel, then to assist in carrying forward suc measured uantity of fuel into the fire box, and finally e ecting the removalof the fuel from the upper surface of the pusher h and the deposit thereof in the place of the fuel which has been displaced by the pusher h. The two pushers, as will be observed, preferably fill the fire door opening I) when they are in their forward position.

The roper relative movements of the pusher z, with respect to the pusher h, are conveniently and preferably effected by the movements of t e pusher h. For this purpose the pusher h is provided with a stop or rojection h by which the pusher 'i is thrust orward with the pusher h, and is also provided with a guide pulley 72, over which passes a chain or flexible cable I which is connected at one end to the rear end of the pusheri and at the other end to the-framef, preferably through the intermediary of a latch m. The latter may be carried by a cross barf 5 of the frame f and is arranged to move into the path of some portion of the pusher i, when it has been carried to its extreme forward position by the usher it, so as to retain the pusher i in suc extreme forward position during the first portion of the rearward movement of the pusher h, for the purpose of effecting the discharge of the fuel from the top of the pusher h. The latch is conveniently o erated by the chain or cable Z, when the slacii is taken out of such chain or cable by the rearward movement of the usher 7t, and therefore acts as an anchor for t e end of such chain or cable, so that as the rearward movement of the pusher h is continued, the guide Wheel or pulley it moving with the pusher It causes the pusher i to move rearwardly upon the pusher h at twice the speed thereof until both reach their rearmost positions, as shown in Fig. 2.

The operation of the improved fuel feeding mechanism will now be readily understood. When the arts are in the positions shown in Figs. 1 and 2 the fuel falls from the hopper g u on the forward portion of the pus er h, which is then uncovered by the pusher i. As the forward movement of the pusher h begins it carries with it the pusher i and the fuel which has been deposited upon the forward ortion of the pusher his carried through the fire door opening I). In the forward movement of the pusher i, over thehorizontal portion a of the grate, since the pusher is below the normal level of the fire surface, it breaks up the coke which has formed on the portion of the fire supported by the horizontal grate and pushes the fuel both forward and to each side upon the inclined portion d of the grate, which movement of the fuel on the horizontal portion of the grate induces a gradual forward movement of the fuel on the inclined portion of the grate. As the two pushers reach the limit of their forward movement the latch m drops behind the pusher i and holds the same in its forward position while the pusher it makes the first ortion of its rearward movement, so that t e fuel which was supported by the pusher h when the two pushers were in their forwardpositions, as shown in Fig. 3, is pushed or scraped off from the pusherh by the movement thereof relative to the then stationary pusher i and the fresh fuel carried in by the pusher h is deposited over the horizontal portion 0 of the rate in the place of the fuel which was disp aced by the extreme forward movement of the pusher h. As soon as the pusher h reaches approximatel theosition indicated in Fig. 4, the slack o the c ain or cable Z is taken up by the pulley 7f. The first effect is to withdraw the latch m so as to release the pusher h and, as the latch, after withdrawal, acts as an anchor for the end of the chain or cable, the continued rearward movement of the pulley h with the pusher it causes the pusher t to be drawn rearwardly upon the pusher h, at twice the speed of the pusher it, until both pushers reach their extreme rearward positions, as shown in Fig. 2, and a fresh charge of fuel is deposited from the hopper upon the ex osed forward portion of the pusher h as be ore.

It will be understood that any usual or suitable means, whether manual or otherwise, for reciprocating the pusher h, may be employed, and that various changes in details of construction and arran ement of the imroved mechanism may e made to suit diferent conditions and different requirements without departing from the spirit of the invention.

I claim as m invention: 1. The combination with a furnace having a fire door of a hopper a reciprocating pusher below the hopper and adapted to receive a charge of fresh fuel upon its upper surface,

means to project the pusher through the fire I for carried y the first pusher, whereby theinto the furnace with its charge of fuel, a

second pusher overlying the first, means to reciprocate the same, and means to hold the second pusher stationary during the first part of the rearward movement of the first namedpusher whereby the fuel carried by the first named pusher is discharged within the furnace.

3. A fuel feeding mechanism comprising a sup ortingframe, a hopper, a pusher mounted on t e frame below the ho per and arranged to receive a charge of fres fuel on its upper surface and carry the same into the furnace, and a second reciprocating pusher overlfying the first and adapted to discharge the resh fuel from the first pusher into the furnace.

4. A fuel feeding. mechanism comprising a supporting frame, a reciprocating pusher mounted thereon and ada ted to carry a fresh charge of fuel into the iiirnace, a second reciprocating usher overlying the first, and means to hol the second usher stationary during the withdrawal of t e first usher to effect the discharge of the fuel t erefrom within the furnace.

5. A fuel feeding mechanism comprising a supporting frame, a reciprocating pusher mounted thereon, a second reci rocating usher mounted thereon andover ying the t pusher, a flexible connection secured at one end of the frame and at the other end to the second usher, and a guide pulley theresecond pusher is withdrawn, by the rearward movement of the first pusher and at a greater speed.

sea by the 6.- A fuel feeding mechanism comprising 7 a supporting frame, a reciprocating pusher mounted thereon, a second reciprocating pusher also mounted thereon and overlying the first pusher, a projection on the first pusher to carry forward the second pusher, and a flexible connection secured at one end to the frame and rat the other end to the sec ond pusher and passing over a guide ulley on the first usher to effect the with rawal of the secon pusher 'during the withdrawalof the first pusher.

7. A fuel feeding mechanism comprising a supporting frame, a reciprocatingpusher mounted thereon, a second pusher also mounted thereon and overlying the first, a

projectionon the first pusher to carry the second pusher forward, a lat-ch'carried by the frame to retain the second pusher in its forward dposition during the first part of the rearwar movement of the first pusher,

and a flexible connection secured to the latch at one end and at the other end to the second pusher and passing over a guide pulley carpusher is carrie with the first pusher, is held temporarily rst usher whereby the second forward into the furnace j during the firstof the rearward movement of the first pusher; and is then withdrawn the first-pusher.

This specification signed and witnessed this 31st day of October, A. D., 1907.

FRANK KINGSLEY. Y

Signed in the presence of:

W. B. GREELEY, ELLIS J. KRUGER.

65. during the contlnued rearward movement of 1 

